From: "Keld Jørn Simonsen" <keld@dkuug.dk>
To: Bill Davidsen <davidsen@tmr.com>
Cc: linux-raid@vger.kernel.org
Subject: Re: raid1 and raid 10 always writes all data to all disks?
Date: Sun, 3 Feb 2008 18:13:17 +0100 [thread overview]
Message-ID: <20080203171317.GA24820@rap.rap.dk> (raw)
In-Reply-To: <47A5E411.10208@tmr.com>
On Sun, Feb 03, 2008 at 10:56:01AM -0500, Bill Davidsen wrote:
> Keld Jørn Simonsen wrote:
> > I found a sentence in the HOWTO:
> >
> >"raid1 and raid 10 always writes all data to all disks"
> >
> >I think this is wrong for raid10.
> >
> >eg
> >
> >a raid10,f2 of 4 disks only writes to two of the disks -
> >not all 4 disks. Is that true?
> >
>
> I suspect that really should have read "all mirror copies," in the
> raid10 case.
OK, I changed the text to:
raid1 always writes all data to all disks.
raid10 always writes all data to the number of copies that the raid holds.
For example on a raid10,f2 or raid10,o2 of 6 disks, the data will only
be written 2 times.
Best regards
Keld
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next prev parent reply other threads:[~2008-02-03 17:13 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-02-02 23:53 raid1 and raid 10 always writes all data to all disks? Keld Jørn Simonsen
2008-02-03 15:56 ` Bill Davidsen
2008-02-03 17:13 ` Keld Jørn Simonsen [this message]
2008-02-04 18:24 ` Bill Davidsen
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